The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 33 |
| 4 | 444 |
| 5 | 55555 |
| 6 | 66666666 |
| 7 | 7777777777777 |
| 8 | 888888888888888888888 |
| 9 | 9999999999999999999999999999999999 |
| 10 | 10101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010 |
[1,2,33,444,55555,66666666,7777777777777, 888888888888888888888, 9999999999999999999999999999999999, 10101010101010101010101010101010101010101010101010\ 10101010101010101010101010101010101010101010101010\ 1010101010] |